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There are plenty people out there that are so obsessed in trying to stay on the bleeding edge as close as possible which means selling their previous machine to get the new one or one model down. Whether it be the system they've just had for 1 - 1.5 years.
Heck I've even read some people have spent a lot of money on a tower or portable to have it sold off again 6 months down the road.

I completely agree. I plan to move to mac after SR, but right now I'm typing on a P4 2.8Ghz Sony. This compy hasn't failed me yet!:D
 
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